What is 50mm on the canon eos 200d in full frame?

50mm on the Canon EOS 200D (APS-C (Canon)) gives the view of 80mm on full frame.

The same view on every common format:

• Medium format (44 x 33): 101mm
• Full frame: 80mm
• APS-C: 53mm
• APS-C (Canon) (yours): 50mm
• Micro Four Thirds: 40mm
• 1-inch: 30mm
• 1/1.3-inch: 22mm
• 1/1.7-inch: 17mm
• 1/2.3-inch: 14mm

Crop factors are by the sensor diagonal, rounded as they're usually quoted; a format with a different shape (4:3 against 3:2) frames a little differently across the width. More in the focal length converter.

Computed from the sensor sizes, not written by a model.